<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<style>
    body {
        height: 800px;
    }
    div {
        width: 100%;
        height: 300px;
        max-height: 50%;
        background-image:url('./2.jpg');
        background-size:cover
        
    }
</style>
<body>
    <div>
        
    </div>
</body>
</html>